diff options
Diffstat (limited to 'include/qemu/main-loop.h')
| -rw-r--r-- | include/qemu/main-loop.h | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h index 5764db1..4e2436b 100644 --- a/include/qemu/main-loop.h +++ b/include/qemu/main-loop.h @@ -27,7 +27,7 @@ #include "block/aio.h" #include "qom/object.h" -#include "sysemu/event-loop-base.h" +#include "system/event-loop-base.h" #define SIG_IPI SIGUSR1 @@ -248,6 +248,14 @@ GSource *iohandler_get_g_source(void); AioContext *iohandler_get_aio_context(void); /** + * rust_bql_mock_lock: + * + * Called from Rust doctests to make bql_lock() return true. + * Do not touch. + */ +void rust_bql_mock_lock(void); + +/** * bql_locked: Return lock status of the Big QEMU Lock (BQL) * * The Big QEMU Lock (BQL) is the coarsest lock in QEMU, and as such it @@ -263,6 +271,21 @@ AioContext *iohandler_get_aio_context(void); bool bql_locked(void); /** + * bql_block: Allow/deny releasing the BQL + * + * The Big QEMU Lock (BQL) is used to provide interior mutability to + * Rust code, but this only works if other threads cannot run while + * the Rust code has an active borrow. This is because C code in + * other threads could come in and mutate data under the Rust code's + * feet. + * + * @increase: Whether to increase or decrease the blocking counter. + * Releasing the BQL while the counter is nonzero triggers + * an assertion failure. + */ +void bql_block_unlock(bool increase); + +/** * qemu_in_main_thread: return whether it's possible to safely access * the global state of the block layer. * |